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Pinjia Zhang

from Clifton Park, NY
Age ~40
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Connected to:
Aaron N Zhang, 60Adelaide X Zhang, 48Aiai Zhang, 38Aijun Zhang, 70Airong Zhang, 71Alfred Zhang, 30Anderson Zhang, 34Angeline Zhang, 36Anli Zhang, 68Anming Zhang, 64

Pinjia Zhang Phones & Addresses

  • 34 Chatsworth Way, Clifton Park, NY 12065 (404) 729-0810
  • Schenectady, NY
  • Atlanta, GA

Work

Company: Ge global research May 2010 Position: Electrical engineer

Education

Degree: PhD School / High School: Georgia Institute of Technology 2006 to 2010 Specialities: Electrical Engineering

Industries

Research

Resumes

Resumes

Pinjia Zhang Photo 1

Electrical Engineer At Ge Global Research

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Position:
Electrical Engineer at GE Global Research
Location:
Albany, New York Area
Industry:
Research
Work:
GE Global Research since May 2010
Electrical Engineer
Education:
Georgia Institute of Technology 2006 - 2010
PhD, Electrical Engineering Tsinghua University 2002 - 2006
BS, Electrical Engineering

Publications

Us Patents

System And Method For Monitoring And Controlling Stator Winding Temperature In A De-Energized Ac Motor

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US Patent:
8084984, Dec 27, 2011
Filed:
Dec 22, 2008
Appl. No.:
12/341044
Inventors:
Bin Lu - Kenosha WI, US
Charles John Luebke - Sussex WI, US
Thomas G. Habetler - Snellville GA, US
Pinjia Zhang - Atlanta GA, US
Scott K. Becker - Oak Creek WI, US
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H02P 1/26
H02P 23/14
H02K 11/00
US Classification:
318800, 318318, 318461, 318798, 318806
Abstract:
A system and method for measuring and controlling stator winding temperature in an AC motor while idling is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of a multi-phase AC motor. The circuit further includes a plurality of switching devices to control current flow and terminal voltages in the multi-phase AC motor and a controller connected to the circuit. The controller is configured to activate the plurality of switching devices to create a DC signal in an output of the motor control device corresponding to an input to the multi-phase AC motor, determine or estimate a stator winding resistance of the multi-phase AC motor based on the DC signal, and estimate a stator temperature from the stator winding resistance. Temperature can then be controlled and regulated by DC injection into the stator windings.

System And Method For Determining Stator Winding Resistance In An Ac Motor Using Motor Drives

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US Patent:
8384338, Feb 26, 2013
Filed:
Jan 30, 2009
Appl. No.:
12/363413
Inventors:
Bin Lu - Kenosha WI, US
Thomas G. Habetler - Snellville GA, US
Pinjia Zhang - Atlanta GA, US
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
H02P 23/00
US Classification:
318811, 318727, 318490, 318813, 318801, 318798, 32476501, 702 85, 702183
Abstract:
A system and method for determining the stator winding resistance of AC motors is provided. The system includes an AC motor drive having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, a pulse width modulation (PWM) converter having switches therein to control current flow and terminal voltages in the AC motor, and a control system connected to the PWM converter. The control system generates a command signal to cause the PWM converter to control an output of the AC motor drive corresponding to an input to the AC motor, selectively generates a modified command signal to cause the PWM converter to inject a DC signal into the output of the AC motor drive, and determines a stator winding resistance of the AC motor based on the DC signal of at least one of the voltage and current.

System And Method For Detecting Fault In An Ac Machine

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US Patent:
8405339, Mar 26, 2013
Filed:
Jul 1, 2010
Appl. No.:
12/829205
Inventors:
Pinjia Zhang - Atlanta GA, US
Bin Lu - Kenosha WI, US
Thomas G. Habetler - Snellville GA, US
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
G01R 31/02
US Classification:
318490, 318798, 318806, 324545, 324 7677, 32476501, 324 7619, 324 86, 361 23, 361 30, 361 31, 361820, 361775, 700286, 340679, 706 20, 706912, 702115, 702185
Abstract:
A system and method for detecting a rotor fault condition in an AC induction machine is disclosed. The system includes a processor programmed to receive voltage and current data from an AC induction machine, generate a current frequency spectrum from the current data, and identify rotor-fault related harmonics in the current frequency spectrum. The processor is also programmed to calculate a fault severity indicator using the voltage and current data, identified rotor-fault related harmonics, and motor specifications, analyze the fault severity indicator to determine a possibility of rotor fault. The processor generates an alert based on the possibility of rotor fault.

System And Method For Determining Stator Winding Resistance In An Ac Motor

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US Patent:
20090051311, Feb 26, 2009
Filed:
Jun 3, 2008
Appl. No.:
12/132484
Inventors:
Bin Lu - Kenosha WI, US
Thomas G. Habetler - Snellville GA, US
Pinjia Zhang - Atlanta GA, US
Peter J. Theisen - West Bend WI, US
International Classification:
H02P 23/14
H02K 11/00
US Classification:
318806, 318490
Abstract:
A system and method for determining stator winding resistance in an AC motor is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor. The circuit includes at least one contactor and at least one switch to control current flow and terminal voltages in the AC motor. The system also includes a controller connected to the circuit and configured to modify a switching time of the at least one switch to create a DC component in an output of the system corresponding to an input to the AC motor and determine a stator winding resistance of the AC motor based on the injected DC component of the voltage and current.

Fault Detection Based On Current Signature Analysis For A Generator

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US Patent:
20130049733, Feb 28, 2013
Filed:
Aug 29, 2011
Appl. No.:
13/219753
Inventors:
Prabhakar Neti - Rexford NY, US
Manoj Ramprasad Shah - Latham NY, US
Karim Younsi - Ballston Lake NY, US
Mayank Tiwari - Bangalore, IN
Pinjia Zhang - Clifton Park NY, US
Assignee:
GENERAL ELECTRIC COMPANY - SCHENECTADY NY
International Classification:
G01N 27/00
US Classification:
324 711
Abstract:
A method of detecting faults in a wind turbine generator based on current signature analysis is disclosed herein. The method includes acquiring a set of electrical signals representative of an operating condition of a generator. Further, the electrical signals are processed to generate a normalized spectrum of electrical signals. A fault related to a gearbox or bearing or any other component associated with the generator is detected based on analyzing the current spectrum.

System For Monitoring A Machine Using A Digital Protective Relay

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US Patent:
20130107400, May 2, 2013
Filed:
Oct 31, 2011
Appl. No.:
13/285418
Inventors:
Xuedong Meng - Ottawa, CA
David Lynn Linkenauger - Williamsburg VA, US
Prabhakar Neti - Rexford NY, US
Mills Thomas Robinson - Virginia Beach VA, US
Pinjia Zhang - Clifton Park NY, US
Assignee:
GENERAL ELECTRIC COMPANY - Schenectady NY
International Classification:
H02H 7/06
US Classification:
361 21
Abstract:
A system for monitoring a machine is provided. The system includes a digital protective relay, a communications network, and a central server. The digital protective relay is connected to the machine, and samples at least one parameter of the machine at a rate of at least about twelve samples per power cycle. The central server is located remotely from the machine for receiving the at least one parameter from the machine. The communications network provides a connection between the digital protective relay and the center server for sending a data signal representing the at least one parameter of the machine.

On-Line Monitoring System For Use With Electrical Assets And Method Of Operating The Same

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US Patent:
20140035595, Feb 6, 2014
Filed:
Jul 31, 2012
Appl. No.:
13/562514
Inventors:
Prabhakar Neti - Rexford NY, US
Pinjia Zhang - Clifton Park NY, US
Manoj Ramprasad Shah - Latham NY, US
International Classification:
G01R 31/02
US Classification:
324511
Abstract:
A system configured to monitor an operating electrical device includes a testing channel coupled to the device. The device is coupled to an electric power source through at least one electric power transmission channel. The power source is configured to transmit electric power at a first frequency. The testing channel is coupled to the power transmission channel. The system also includes a signal generator coupled to the testing channel. The signal generator is configured to inject testing signals into the testing channel at a second frequency that is greater than the first frequency. The system further includes at least one apparatus magnetically coupled to the power transmission channel. The magnetically coupled apparatus is configured to present a first impedance to the electric power at the first frequency and present a second impedance to the test signals at the second frequency. The second impedance is greater than the first impedance.

Systems And Methods For Crack Detection In Doubly-Fed Induction Generators

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US Patent:
20170176536, Jun 22, 2017
Filed:
Dec 16, 2015
Appl. No.:
14/971464
Inventors:
- Schenectady NY, US
Manoj Ramprasad Shah - Latham NY, US
Prabhakar Neti - Rexford NY, US
Pinjia Zhang - Clifton Park NY, US
International Classification:
G01R 31/34
F03D 17/00
Abstract:
A fault detection system for a wind turbine includes a doubly-fed induction generator (DFIG). The DFIG includes a wye-ring configured for at least three electrical phases. The fault detection system includes a data acquisition system including at least three sensors. Each sensor of said at least three sensors is configured to electrically couple with and measure a respective voltage of each phase of the at least three electrical phases of the wye-ring. The fault detection system further includes an alert system coupled to said data acquisition system. The alert system is configured to apply a Fourier transform to the respective measured voltages of each phase of the at least three electrical phases of the wye-ring. The alert system is further configured to provide an indication of a condition of the wye-ring based upon the transformed measured voltages.
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Pinjia Zhang from Clifton Park, NY, age ~40 Get Report